Missing Angle BAC = 20°

運算式 15: "c" Subscript, 1 , Baseline equals hsv left parenthesis, 1 , 0 , 1 , right parenthesis

運算式 16: "A" Subscript, 1 , Baseline equals "C" Subscript, 1 , Baseline minus StartFraction, "C" Subscript, 2 , Baseline left parenthesis, "C" Subscript, 1 , Baseline minus "M" Subscript, 1 , Baseline , right parenthesis Over "C" Subscript, 2 , Baseline minus "M" Subscript, 2 , Baseline , EndFraction

運算式 17: "A" Subscript, 2 , Baseline equals StartRoot, 0 , EndRoot

運算式 18: "C" Subscript, 1 , Baseline equals "D" Subscript, 1 , Baseline minus "C" Subscript, "D" , Baseline cosine left parenthesis, negative "A" Subscript, "D" "B" , Baseline minus "B" Subscript, "D" "C" , Baseline , right parenthesis

運算式 19: "C" Subscript, 2 , Baseline equals negative "C" Subscript, "D" , Baseline sine left parenthesis, negative "A" Subscript, "D" "B" , Baseline minus "B" Subscript, "D" "C" , Baseline , right parenthesis

運算式 20: "D" Subscript, 1 , Baseline equals 7.4 2 2 2 7 1 9 8 9 6 9

運算式 21: "D" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline

運算式 22: "B" Subscript, 1 , Baseline equals "D" Subscript, 1 , Baseline minus "B" Subscript, "D" , Baseline cosine left parenthesis, negative "A" Subscript, "D" "B" , Baseline , right parenthesis

運算式 23: "B" Subscript, 2 , Baseline equals "D" Subscript, 2 , Baseline minus "B" Subscript, "D" , Baseline sine left parenthesis, negative "A" Subscript, "D" "B" , Baseline , right parenthesis

運算式 24: "M" Subscript, 1 , Baseline equals "D" Subscript, 1 , Baseline minus "D" Subscript, "M" , Baseline cosine left parenthesis, negative "A" Subscript, "D" "B" , Baseline , right parenthesis

運算式 25: "M" Subscript, 2 , Baseline equals "D" Subscript, 2 , Baseline minus "D" Subscript, "M" , Baseline sine left parenthesis, negative "A" Subscript, "D" "B" , Baseline , right parenthesis

Graphs

運算式 27: "y" less than 25

運算式 28: polygon left parenthesis, "A" , "B" , "C" , "A" , "C" , "D" , "B" , "D" , right parenthesis

Points

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